Drive mechanism for vehicle

ABSTRACT

A foot driven vehicle utilizing a platform. The platform is motivated on a surface utilizing a foot pedal connected to a crank. The crank further includes an endless surface which is linked to a first wheel supported directly to the bottom of the platform. An element which is engageable by a foot or gripable by a hand, is linked to a second wheel supported by the bottom of the platform. The element is movable to turn the second wheel for the purposes of steering. A brake is also included in the present invention for arresting the turning of the first and/or second wheels. The brake includes a flange which is also operated by the foot of the user. A ratchet may also be used in the first wheel to bias rotation of the same.

CROSS REFERENCES TO RELATED APPLICATIONS

The present application is a Continuation-in-Part of U.S. patentapplication Ser. No: 09/219,565, filed Dec. 21, 1998.

BACKGROUND OF THE INVENTION

The present invention relates to a novel and useful foot driven vehicle.

Many non-motorized vehicle platforms have been proposed and built in thepast. Essentially, these items are noted as being classified asscooters, skateboards, and the like.

Although many of such scooters and skateboards are steerable anddependent on gravitational pull for operation, several designs have beenproposed for driving the same.

Reference is made to U.S. Pat. No. 4,621,825 which describes anoscillating platform in which the user shifts his weight to affectforward motion of skateboard.

U.S. Pat. No. 5,310,202 shows a skateboard having a pedal mounted on theupper surface of a platform which drives a horizontally displaceablerack via a cam.

U.S. Pat. No. 4,861,055 shows a scooter having a steering bar andmechanism for converting oscillating motion onto rotary motion throughthe use of endless chains.

A foot driven vehicle having the capability of complete motionalcontrol, including the generating speed, stopping, and steering throughfoot operated mechanisms would be a notable advance in the recreationalvehicle field.

SUMMARY OF THE INVENTION

In accordance with the present invention a novel and useful foot drivenvehicle is herein provided.

The foot driven vehicle of the present invention utilizes a platformhaving motivating means for urging the platform along a surface. Themotivating means includes a foot pedal connected to a crank. The crankincludes an endless surface linked to a first wheel supported to theplatform. The endless surface may include a friction surface or a gearedsurface which is capable of transmitting the rotation motion of thecrank to the wheel connected to the platform. In addition, a spur gearwheel may be located intermediate the crank surface and the wheelsupported by the platform. In such an embodiment, the rotation motion ofthe first wheel supported to the platform would be reversed in directionfrom the motivating means lacking the spur gear. Other gear arrangementsmay be employed to vary the rotational speed of the first wheel.

The foot driven vehicle of the present invention may also include asteering element engageable by the foot or gripable by the hand of theuser. The element would be linked to a second wheel supported to theplatform and would be movable in order to turn the second wheel about anaxis generally perpendicular to the platform. Such steering element mayinclude a stirrup-like structure. In addition, the steering element mayfurther comprise a rotatable shaft which is connected to the secondwheel and to the stirrup. The shaft may terminate in a handle. A bearingsupported by the platform may surround the rotatable shaft to ease theturning of the shaft during the steering process.

Brake means is also provided in the present invention for selectivelyarresting the turning of the first and second wheels. The brake meansmay include a hinge flange engageable by the foot of the user. The hingeflange could be linked to a conventional bicycle caliper on either thefirst or second wheel. The brake means flange may be found on the uppersurface of the platform and be in the vicinity of the motivating meansfoot pedal in order to permit the user to rapidly move a foot betweenthese two control mechanisms.

It should be further noted that a third wheel may be employed in thepresent invention for movement with the first wheel at the lower side ofthe platform. The first and third wheels may be motivated by the crankwhich may have a pair of shafts or a pair of endless surface memberssuch as gear wheels. Such gear wheels may be directly linked to a singleor double pinion gear along the axis of the first and third wheels, ormay be linked by using an intermediate spur or pinion gear to reversethe direction of turning of the first and second wheels.

In certain embodiments the motivating means may include a ratchet gearaxially located relative to the first wheel. Rotational force istransmitted from the crank endless surface to the ratchet gear. Suchtransfer may be accomplished by a multiplicity of gears engaging theendless surface of the crank. A gear axle may also be formed between twogears of the multiplicity of gears.

Moreover, the first wheel and crank may be directly supported forrotation to the platform to lower the platform relative to the groundsurface.

It may be apparent that a novel and useful foot driven vehicle has beenheretofore described.

It is therefore an object of the present invention to provide a footdriven vehicle which permits the user to control the same using only theuser's feet.

Another object of the present invention is to provide a foot drivenvehicle which is as simple to manufacture and maintain.

A further object of the present invention is to provide a foot drivenvehicle which generates torque through a gear crank mechanism.

Yet another object of the present invention is to provide a foot drivenvehicle which may be safely operated on various surfaces.

Another object of the present invention is to provide a drive mechanismfor a vehicle that is stable and easy to steer.

The invention possesses other objects and advantages especially asconcerns particular characteristics and features thereof which willbecome apparent as the specification continues.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top left side perspective view of an embodiment of thepresent invention.

FIG. 2 is a sectional view taken along line 2—2 of FIG. 1.

FIG. 3 is a sectional view taken along line 3—3 of FIG. 2.

FIG. 4 is a top plan view of an embodiment of the motivating meansappearing beneath the platform.

FIG. 5 is another embodiment of the motivating means appearing beneaththe surface of the platform.

FIG. 6 is yet another embodiment of the motivating means appearingbeneath the surface of the platform.

FIG. 7 is a sectional view showing another embodiment of the presentinvention in which the platform is depicted in section.

FIG. 8 is an enlarged side view of a portion of the brake mechanismmounted on the top portion of the platform.

FIG. 9 is a partial end elevational view of the interconnection of thecrank arm to the foot pedal depicted in FIGS. 2 and 7.

FIG. 10 is a sectional view depicting another embodiment of the presentinvention.

FIG. 11 is a bottom plan view of the embodiment of FIG. 10.

FIG. 12 is a bottom plan view of an alternate gear arrangement for theembodiment of FIG. 10.

FIG. 13 is a side elevational view of the ratchet mechanism used in theembodiment of FIG. 10.

FIG. 14 is a side view of yet another embodiment of the presentinvention.

FIG. 15 is sectional view taken along line 15—15 of FIG. 14.

FIG. 16 is a front elevational view of a further embodiment of FIG. 14.

FIG. 17 is a partial sectional view of the steering mechanism depictedin FIG. 16.

For a better understanding of the invention reference is made to thefollowing detailed description of the preferred embodiments thereofwhich should be taken in conjunction with the heretofore describeddrawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Various aspects of the present invention will evolve from the followingdetailed description of the preferred embodiments thereof, which shouldbe referenced to the prior delineated drawings.

The invention as a whole is depicted in the drawings by referencecharacter 10. The foot driven vehicle 10 includes as one of its elementsa platform 12 which may include a broad portion 14 and a narrowedportion 16. Platform 12 is shown in the embodiments of the presentinvention to be in the form of a plate of uniform thickness. Platform 12may be constructed of any rigid or semi-rigid material such as metal,plastic, wood, and the like.

Turning to FIG. 2, it may be seen that vehicle 10 includes as one of itselements motivating means 18 for urging platform 12 along a surface 20.Motivating means 18 includes a foot pedal 22 attached to the uppersurface 24 of platform 12 by hinge 26. Motivating means 18 is furtherformed with a crank 28 having a gear wheel 30. Crank arm 32 is fastenedto gear wheel 30 eccentrically. Arm or rod 32 also connects to footpedal 22 through a pivot pin 34 which is fastened to a journal 36.Journal 36 is connected to foot pedal 22, FIG. 9. As depicted in FIG. 1,gear wheel 30 may be engaged at its endless surface 38, by spur gear 40,which in turn connects to gear 42 along the axis of first wheel 44.

Turning to FIG. 7 it may be seen that motivating means 46 includes manyof the elements of motivating means 18. However, gear wheel 30 directlyconnects to gear 42 on wheel 44. Thus, with respect to FIGS. 2 and 7 itmay be apparent that first wheel 44 turns in an opposite direction whenmotivating means 18 or 46 is employed, directional arrows 48 and 50,FIGS. 2 and 7.

Turning now to FIGS. 4-6, it may be observed that variations ofmotivating means 18 is depicted. In FIG. 4, crank arm 52 is linked togear wheel 54, spur gear 56, and gear 58 associated with wheel 60. Crankarm 52 is connected to pedal 22 in the same manner as crank arm 32.Pairs of shafts 62, 64, and 66 hold axles 68, 70, and 72 to the lowersurface 74 of platform 12. Of course, axle 72 supports gears 42 and 58,as well as wheels 44 and 60.

FIG. 5 depicts another modification of the present invention 10, inwhich another motivating means 76 is depicted. Cranks 32 and 52 againare connected to foot pedal 12, but a single axle 78 connects discs 80and 82 to gear wheel 84. Of course, arms 32 and 52 are eccentricallyconnected to discs 80 and 82 in the same manner as the connectiondepicted in FIG. 2 between rod 32 and gear wheel 30. Axle 78 then turnsgear wheel 84 which in turn activates spur gear 86 and gear 88 fixed toaxle 90 between wheels 44 and 60.

FIG. 6 depicts yet another embodiment of a motivating means 92. A footpedal 94 of shortened configuration turns crank arm 96 which iseccentrically connected to gear wheel 98. Spur gear 100 and wheel gear102 are turned according to the FIG. 2 depiction showing the turning ofwheels 44 and 60.

Referring now to FIG. 2 once again, steering element 104 is shown.Steering element 104 includes a stirrup 106 engageable by a foot 108 ofthe user. Bearing 110 permits shaft 112 to turn within platform 12.Shaft 112 is connected to steering wheel fork, and axle 114 along anaxis generally perpendicular to lower surface 74 of platform 12. Itshould be noted that steering element 104 depicted in FIG. 7 issubstantially the same as that depicted in FIG. 2 except that foot 108enters stirrup 106 from a different direction.

Brake means 116 is also found in the present invention. Brake means 116includes a padded calliper 118 of conventional bicycle configurationwith respect to steering wheel, fork and axle 114, FIG. 6 and 7. Cable120 leads from a pedal 122 which is pivotally mounted by a pivot pin 124by bracket 126. Bracket 126 is held to platform 12 by a fastener 128which may be a screw, bolt, glue compound, and the like. Spring 130biases pedal 122 into the position shown in FIG. 8. It should be notedthat spring 132 also biases pedal 22 in the same manner to the positionshown in FIGS. 2 and 7.

Turning now to FIGS. 10-12, another embodiment 210 is depicted. Commonelements with respect to embodiment 10 of FIGS. 1-10 are noted byidentical reference characters. A plurality of gears 212 turns wheels 44and 60, FIG. 11. Such turning occurs by the pushing of pedal 22 by foot134 in the operation of cranks 32 and 52. Gear wheels 30 and 54 meshwith gears 214 and 216. Axle 218 turns gear 220 and engaged gear 224.Axle 226 links to wheels 44 and 60 through a rachet mechanism 228, FIG.13. Thus, the pressing of pedal 22 downwardly operates embodiment 210such that wheels 44 and 60 turn according to directional arrow 230,only.

Turning to FIG. 12, it may be observed that another embodiment of theinvention is shown in which gear 100 of plurality of gears 232 links togear 234 via axle 236. Gear 234 engages gear 238 along axle 226, whichagain links wheels 44 and 60. Gear 238 may also include the ratchetmechanism 228 of FIG. 13.

Returning to FIG. 10, it should be observed that brake pedal 122 andpedal 22 of motivating means 18 includes springs 240 and 242,respectively. Thus, pedals 122 and 22 are biased upwardly away fromplatform 12 when not in use.

Referring now to FIG. 14, another embodiment 300 of the presentinvention is depicted. Embodiment 310 includes a platform 312 supportinga brake mechanism 314 and a motivating pedal 316. These elements arevirtually identical to those described hereinbefore with reference toembodiments 10 and 210, depicted in the prior drawings. Embodiment 310includes a gear train 318. Specifically, crank arm 319, connected topedal 316, having a transverse stiffener 317, operates gear 320. Gears322, 324, and 326 provide rotational movement to axle 328, which rotateswheels 330 and 332. of course, other gear arrangements may be employedin this regard such as those shown in FIGS. 1-13. Most importantly,gears 320, 322, 324, and 326 are directly supported to platform 312. Inthis regard, gear 320 is held by bearing and shaft support 334. Bearingand shaft support 336 is associated with gears 322 and 324. Finally,axle 328 is supported by a plurality of bearings 336 which also supportsgear 326.

In addition, steering mechanism 338 is depicted in the drawings.Steering mechanism 338 includes a rotatable shaft 340 which possess astirrup 342 that is engageable by a foot 344, shown in phantom on FIG.14. Stirrup 342 extends or projects angularly relative to an axis 344perpendicular to platform 312. It should be noted that a shaft 352 mayextend directly to wheel 350 without stirrup 342, FIG. 16. Bearing andshaft support 346 allows stirrup 342 to rotate relative to platform 312,directional arrow 348. Wheel 350, thus, moves to direct vehicle 310.Wheel 350 may include a pair of wheels rather than the single wheelshown in FIGS. 14 and 16, coaxially connected. In addition, a shaft 352and a handle 354 may be employed, FIG. 16, to permit the user to holdthe same and aid in the steering of vehicle 310 by rotating handle 354.It should be noted that brake 314 may be either connected to wheel 350and/or to the rear wheels 330 and 332. The brake mechanism for suchwheels may be identical to that shown in the embodiments 10 or 210,prior described.

In operation, the user utilizes the mechanism 10 depicted in FIG. 2 byplacing one foot 108 into stirrup 106 to steer wheel 114 by turningshaft 112. Another foot 134 presses pedal 22 to turn gear wheel 30according to directional arrow 136. Wheel 44 or pairs of wheel 44 and 60then move shown by directional arrow 48. The turning of crank and gearwheel 30 causes similar motion in wheels 44 and 60 as depicted in FIGS.4-6. In the embodiment shown in FIG. 2, the user presses brake pedal 122which operates the calliper and pads 118 on steering wheel 114 in theembodiment shown in FIGS. 2 or 7. It should be noted, however, that foot134 in the embodiment shown in FIG. 2 would leave pedal 22 and movebackwardly toward pedal 122 to activate brake means 116. In FIG. 7, foot134 would leave foot pedal 122 and move forwardly to operate brake 116by pressing pedal 122. In either case, the user of vehicle 10 hascomplete motional control.

While in the foregoing, embodiments of the present invention have beenset forth in considerable detail for the purposes of making a completedisclosure of the invention, it may be apparent to those of skill in theart that numerous changes may be made in such detail without departingfrom the spirit and principles of the invention.

What is claimed is:
 1. A drive mechanism for a vehicle, comprising: a. aplatform; b. motivating means for moving said platform along a surface,said motivating means comprising a foot pedal connected to a crank, saidcrank including an endless surface linked to a first wheel said firstwheel and said crank directly secured to said platform; c. a steeringelement engageable by a foot, said steering element linked to a secondwheel supported to said platform, said element being movable to turn asecond wheel; and d. brake means for selectively arresting the turningof at least one of said first and second wheels.
 2. The drive mechanismof claim 1 in which said motivating means further comprises a hingedflange engageable by a foot, said hinged flange being selectively linkedto a caliper engaging at least one of said first and second wheel. 3.The drive mechanism of claim 1 in which said motivating means furthercomprises a gear wheel located intermediate to and contacting saidendless surface of said crank and said wheel supported to said platform.4. The drive mechanism of claim 1 in which said steering element furthercomprises a rotatable shaft and a stirrup said rotatable shaft andstirrup being connected to said second wheel.
 5. The drive mechanism ofclaim 4 which additionally comprises a bearing surrounding saidrotatable shaft.
 6. A drive mechanism for a vehicle, comprising: a. aplatform; b. motivating means for moving said platform along a surface,said motivating means comprising a foot pedal connected to a crank, saidcrank including an endless surface linked to a first wheel, said firstwheel and said crank directly supported on an upper surface of saidplatform; c. a steering element, said steering element comprising ashaft extending outwardly from said platform, said steering elementlinked to a second wheel and being movable to turn said second wheel;said shaft including means for removably securing operator engagementmeans for turning said shaft and steering said second wheel, saidoperator engagement means including either one of a foot-engagingstirrup and a hand-engaging handle assembly; and d. brake means forselectively arresting the turning of at least one of said first andsecond wheels.
 7. The drive mechanism of claim 6 in which said steeringelement further comprises a bearing surrounding said shaft linked tosaid second wheel, said bearing and shaft positioned to provide a casterrelative to said platform.
 8. The drive mechanism of claim 6 in whichsaid brake means comprises a hinged flange engageable by a foot, saidhinged flange being selectively linked to a caliper engaging either ofsaid first and second wheels.
 9. The drive mechanism of claim 6 in whichsaid motivating means further comprises a gear wheel locatedintermediate to and contacting said endless surface of said crank andsaid wheel supported on said platform.
 10. The drive mechanism of claim1 in which said foot pedal includes a transverse stiffener.
 11. Thedrive mechanism of claim 6 in which said foot pedal includes atransverse stiffener.